Main-story estimate
Developer Hiroyuki Kobayashi estimated approximately 20 hours for skilled action-game players and 30 hours for an average playthrough, using the story goal of defeating KOM. This is a pre-release developer estimate, not a HowLongToBeat community average.
| Scope | Time to plan around | What it means |
|---|---|---|
| First Bite Demo | About 2 hours | Opening content, not a fixed time limit. |
| Dive and base preparation loop | About 20–30 minutes | A shorter repeated gameplay loop. |
| Main story | About 20–30 hours | Developer estimate through KOM. |
| All achievements and postgame | No dependable average | Do not budget these from the story estimate alone. |
Completion and postgame
An edited full-game video can be much shorter than a typical playthrough. Video length depends on editing, preparation and the player’s pace, so a 9.5- or 14-hour recording does not establish a normal completion time.
The main story and Everent Hollow are different milestones. If you intend to clear achievements as well, use the trophy roadmap to track the remaining tasks rather than adding an arbitrary percentage to the story time.